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#[macro_export]
macro_rules! assert_text_eq {
($left: expr, $right: expr) => {
if $left != $right {
let orig = $right;
let edit = &$left[0..];
$crate::print_diff_github_style(orig, edit);
panic!("assertion failed")
};
};
}
#[macro_export]
macro_rules! assert_text_starts_with {
($left: expr, $right: expr) => {
if !$left.starts_with($right) {
let ll = $left.len();
let rl = $right.len();
let orig = $right;
let edit = &$left[0..ll.min(rl)];
$crate::print_diff_github_style(orig, edit);
panic!("assertion failed")
};
};
}
#[macro_export]
macro_rules! assert_text_ends_with {
($left: expr, $right: expr) => {
if !$left.ends_with($right) {
let ll = $left.len();
let rl = $right.len();
let orig = $right;
let edit = &$left[if ll > rl { ll - rl } else { 0 }..];
$crate::print_diff_github_style(orig, edit);
panic!("assertion failed")
};
};
}
#[macro_export]
macro_rules! assert_text_match {
($left: expr, $right: expr) => {
let re = regex::Regex::new($right).unwrap();
if !re.is_match($left) {
assert_eq!($left, concat!("not match of regex: \"", $right, "\""));
};
};
}
use difference::{Changeset, Difference};
use std::string::ToString;
pub fn print_diff_github_style(text1: &str, text2: &str) {
let color_green = "\x1b[32m";
let color_red = "\x1b[31m";
let color_bright_green = "\x1b[1;32m";
let color_reverse_red = "\x1b[31;7m";
let color_reverse_green = "\x1b[32;7m";
let color_end = "\x1b[0m";
let mut out_s = String::new();
let Changeset { diffs, .. } = Changeset::new(text1, text2, "\n");
for i in 0..diffs.len() {
let s = match diffs[i] {
Difference::Same(ref y) => format_diff_line_same(y),
Difference::Add(ref y) => {
let opt = if i > 0 {
if let Difference::Rem(ref x) = diffs[i - 1] {
Some(format_diff_add_rem(
"+",
x,
y,
color_green,
color_reverse_green,
color_end,
))
} else {
None
}
} else {
None
};
match opt {
Some(a) => a,
None => format_diff_line_mark("+", y, color_bright_green, color_end),
}
}
Difference::Rem(ref y) => {
let opt = if i < diffs.len() - 1 {
if let Difference::Add(ref x) = diffs[i + 1] {
Some(format_diff_add_rem(
"-",
x,
y,
color_red,
color_reverse_red,
color_end,
))
} else {
None
}
} else {
None
};
match opt {
Some(a) => a,
None => format_diff_line_mark("-", y, color_red, color_end),
}
}
};
out_s.push_str(s.as_str());
}
print!("{}", out_s.as_str());
}
#[inline(never)]
fn format_diff_line_same(y: &str) -> String {
let mut s = String::with_capacity(y.len() + 2);
for line in y.split_terminator('\n') {
s.reserve(line.len() + 2);
s.push(' ');
s.push_str(line);
s.push('\n');
}
s
}
#[inline(never)]
fn format_diff_line_mark(
mark: &str, y: &str,
color_start: &str,
color_end: &str,
) -> String {
let mut s = String::with_capacity(y.len() + 2);
for line in y.split_terminator('\n') {
s.reserve(line.len() + 2);
s.push_str(color_start);
s.push_str(mark);
s.push_str(line);
s.push_str(color_end);
s.push('\n');
}
s
}
#[inline(never)]
fn format_diff_add_rem(
mark: &str, x: &str,
y: &str,
color_fore: &str,
color_reverse: &str,
color_end: &str,
) -> String {
#[derive(PartialEq, Copy, Clone)]
enum Cattr {
None,
Fore,
Reve,
}
let mut ca_v: Vec<(Cattr, String)> = vec![(Cattr::Fore, mark.to_string())];
let Changeset { diffs, .. } = Changeset::new(x, y, " ");
for c in diffs {
match c {
Difference::Same(ref z) => {
for line in z.split_terminator('\n') {
ca_v.push((Cattr::Fore, line.to_string()));
ca_v.push((Cattr::None, "\n".to_string()));
ca_v.push((Cattr::Fore, mark.to_string()));
}
let bytes = z.as_bytes();
let len = bytes.len();
if len >= 1 && bytes[len - 1] != b'\n' {
ca_v.pop();
ca_v.pop();
}
ca_v.push((Cattr::Fore, " ".to_string()));
}
Difference::Add(ref z) => {
for line in z.split_terminator('\n') {
ca_v.push((Cattr::Reve, line.to_string()));
ca_v.push((Cattr::None, "\n".to_string()));
ca_v.push((Cattr::Fore, mark.to_string()));
}
let bytes = z.as_bytes();
let len = bytes.len();
if len >= 1 && bytes[len - 1] != b'\n' {
ca_v.pop();
ca_v.pop();
}
ca_v.push((Cattr::Fore, " ".to_string()));
}
_ => {}
};
}
let mut out_s = String::with_capacity(x.len().max(y.len()) * 2);
let mut prev_a: Cattr = Cattr::None;
for (cat, st) in &ca_v {
if prev_a != *cat {
if prev_a != Cattr::None {
out_s.push_str(color_end)
}
if *cat == Cattr::Fore {
out_s.push_str(color_fore);
} else if *cat == Cattr::Reve {
out_s.push_str(color_reverse);
}
prev_a = *cat;
}
out_s.push_str(st.as_str());
}
if prev_a != Cattr::None {
out_s.push_str(color_end);
}
out_s.push('\n');
out_s
}